We should consider the professor’s advice _______ our school library provide more books on popular science.
6. He is quite sure that it’s impossible for him to finish the task within two days.
5. China has made great progress in the sun’s rays as a source of energy.
4. Have you heard of the town when they built the dam?
3. The power station we visited half the province’s energy.
2.Operations which left patients and in need of long periods of recovery time now leave them feeling relaxed and comfortable.